Mix first eight ingredients together; marinate meat in mixture, 1 hr to overnight (sometimes I put it in the freezer for later use). Heat frying pan very hot with a little bit of spray oil; drain marinade from meat and save. Cook meat until browned, 2-3 minutes/side. Meanwhile, mix 2 t corn starch with a small amount of the marinade; put mixture into the rest of the marinade. Boil marinade until it thickens. Serve meat in lettuce leaves with a little of the thickened sauce, with brown rice and steamed stir fry veggies (from a frozen package) on the side.